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C# LocalTemporary.Emit方法代码示例

本文整理汇总了C#中LocalTemporary.Emit方法的典型用法代码示例。如果您正苦于以下问题:C# LocalTemporary.Emit方法的具体用法?C# LocalTemporary.Emit怎么用?C# LocalTemporary.Emit使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在LocalTemporary的用法示例。


在下文中一共展示了LocalTemporary.Emit方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。

示例1: Emit

		public override void Emit (EmitContext ec)
		{
			// TODO: generate less temporary variables
			LocalTemporary value_target = new LocalTemporary (type);

			value_target.AddressOf (ec, AddressOp.Store);
			ec.Emit (OpCodes.Initobj, type);
			value_target.Emit (ec);
		}
开发者ID:saga,项目名称:mono,代码行数:9,代码来源:nullable.cs

示例2: Emit

		public override void Emit (EmitContext ec)
		{
			Label end_label = ec.DefineLabel ();

			if (unwrap != null) {
				Label is_null_label = ec.DefineLabel ();

				unwrap.EmitCheck (ec);
				ec.Emit (OpCodes.Brfalse, is_null_label);

				//
				// When both expressions are nullable the unwrap
				// is needed only for null check not for value uwrap
				//
				if (type.IsNullableType && TypeSpecComparer.IsEqual (NullableInfo.GetUnderlyingType (type), unwrap.Type))
					unwrap.Load (ec);
				else
					left.Emit (ec);

				ec.Emit (OpCodes.Br, end_label);

				ec.MarkLabel (is_null_label);
				right.Emit (ec);

				ec.MarkLabel (end_label);
				return;
			}

			//
			// Null check is done on original expression not after expression is converted to
			// result type. This is in most cases same but when user conversion is involved
			// we can end up in situation when user operator does the null handling which is
			// not what the operator is supposed to do.
			// There is tricky case where cast of left expression is meant to be cast of
			// whole source expression (null check is done on it) and cast from right-to-left
			// conversion needs to do null check on unconverted source expression.
			//
			if (user_conversion_left) {
				var op_expr = (UserCast) left;

				op_expr.Source.Emit (ec);
				LocalTemporary temp;

				// TODO: More load kinds can be special cased
				if (!(op_expr.Source is VariableReference)) {
					temp = new LocalTemporary (op_expr.Source.Type);
					temp.Store (ec);
					temp.Emit (ec);
					op_expr.Source = temp;
				} else {
					temp = null;
				}

				var right_label = ec.DefineLabel ();
				ec.Emit (OpCodes.Brfalse_S, right_label);
				left.Emit (ec);
				ec.Emit (OpCodes.Br, end_label);
				ec.MarkLabel (right_label);

				if (temp != null)
					temp.Release (ec);
			} else {
				//
				// Common case where expression is not modified before null check and
				// we generate better/smaller code
				//
				left.Emit (ec);
				ec.Emit (OpCodes.Dup);

				// Only to make verifier happy
				if (left.Type.IsGenericParameter)
					ec.Emit (OpCodes.Box, left.Type);

				ec.Emit (OpCodes.Brtrue, end_label);

				ec.Emit (OpCodes.Pop);
			}

			right.Emit (ec);

			ec.MarkLabel (end_label);
		}
开发者ID:Profit0004,项目名称:mono,代码行数:82,代码来源:nullable.cs


注:本文中的LocalTemporary.Emit方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。